const GLvoid *ptr )

PARAMETERS
       stride  Specifies  the  byte  offset between consecutive edge flags.  If
               stride is 0 (the initial value), the edge flags  are  understood
               to be tightly packed in the array. The initial value is 0.

       ptr     Specifies  a  pointer  to  the first edge flag in the array. The
               initial value is zero.

DESCRIPTION
       glEdgeFlagPointer specifies the location and data format of an array  of
       boolean  edge  flags  to  use  when rendering. stride specifies the byte
       stride from one edge flag to the next allowing vertexes  and  attributes
       to be packed into a single array or stored in separate arrays.  (Single-
       array storage  may  be  more  efficient  on  some  implementations;  see
       glInterleavedArrays.)

       When  an  edge  flag  array  is  specified,  stride and ptr are saved as
       client-side state.

       To enable and disable the edge flag array, call glEnableClientState and
       glDisableClientState with the argument GL_EDGE_FLAG_ARRAY.  If  enabled,
       the  edge  flag  array  is  used  when  glDrawArrays, glDrawElements, or
       glArrayElement is called.

       Use glDrawArrays to construct a sequence of primitives (all of the  same
       type)  from  prespecified  vertex  and  vertex  attribute  arrays.   Use
       glArrayElement to specify primitives by indexing vertexes and vertex at‐
       tributes and glDrawElements to construct a sequence of primitives by in‐
       dexing vertexes and vertex attributes.

NOTES
       glEdgeFlagPointer is available only if the GL version is 1.1 or greater.

       The edge flag array is initially disabled and it won't be accessed when
       glArrayElement, glDrawElements or glDrawArrays is called.

       Execution of glEdgeFlagPointer is not allowed between the  execution  of
       glBegin  and  the  corresponding execution of glEnd, but an error may or
       may not be generated. If no error is generated, the operation  is  unde‐
       fined.

       glEdgeFlagPointer is typically implemented on the client side.

       Edge  flag  array parameters are client-side state and are therefore not
       saved   or   restored   by   glPushAttrib    and    glPopAttrib.     Use
       glPushClientAttrib and
       glPopClientAttrib instead.

ERRORS
       GL_INVALID_ENUM is generated if stride is negative.